Gun hone



Nov. 3; 1953 c. E. SEYMOUR 2,657,507

GUN HONE Filed Feb. 25, 1952 Fig.2 4

Clark E. Seymour INVENTOR.

I I BY ZWW$% Patented Nov. 3, 1953 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates in general to gun bones, and more specifically tohones for refinishing the barrels of shot guns.

The primary object of this invention is to provide an improved gun honefor use in refinishing tapered barrels of shotguns whereby the abrasiveelements of the bones may follow the taper of the shot gun barrel.

Another object of this invention is to provide an improved gun honewhich may be quickly and easily connected to a conventional electricdrill and utilized for refinishing the barrel of a conventional shotgun.

Another object of this invention is to provide an improved gun hone forshot gun barrels which is of extremely simple construction Whereby theelements thereof may be quickly made and assembled so as to beeconomically feasible.

Another object of this invention is to provide an improved gun honeadapted for use in reconditioning shot gun barrels, said gun hone beingprovided with removable abrasive elements which may be quicklyinterchanged.

A further object of this invention is to provide an improved gun honefor shot gun barrels in which the abrasive elements thereof are urgedoutwardly by a longitudinally curved leaf spring which has limitedengagement with the abrasive elements whereby the abrasive elements mayfollow the taper or choke of the shot gun barrel.

With these objects definitely in View, this invention resides in certainnovel features of construction, combination and arrangement of elementsand portions as will be hereinafter described in detail in thespecification, particularly pointed out in the appended claim, andillustrated in the accompanying drawings which form a material part ofthis application and in which:

Figure 1 is a perspective view of the improved gun hone for shot gunbarrels, the hone being illustrated connected to a drive shaft forrotating same, the abrasive elements of the hone being illustrated intheir normal gun barrel engaging position;

Figure 2 is an enlarged longitudinal vertical sectional portion throughthe end portion of the shot gun barrel, the hone being shown in sectionand illustrating the relationship between the abrasive elements, theirholder, and a spring for urging the abrasive elements outwardly and intoengagement with the surfaces of the gun barrel;

Figure 3 is an enlarged top plan view of the gun hone of Figure 1, theabrasive element being omitted in order to show the relationship of theleaf spring with respect to an opening rectangular through the holder inwhich it is disposed; and,

Figure 4 is an enlarged transversely vertical sectional view takensubstantially upon the plane indicated by the section line 44 of Figure2 and showing the internal construction of the gun hone and therelationship of the abrasive elements with respect to the holder of thegun hone and the interior of the shot gun barrel.

different views of the drawings.

Referring now to the drawings in detail, it will be seen that the hone,which is the subject of this invention, is particularly adapted for usewith a shot gun barrel and includes an elongated housing It which iscircular in cross-section and has an elongated longitudinally extendingopening extending transversely therethrough, said rectangular openingbeing referred to by the reference numeral l2. One end of the housing Itis provided With an internally threaded bore I 4 extendinglongitudinally through said one end and communicating L with the openingl2. The end of the housing l0 provided with the internally threaded boreI4 is also provided with an enlarged annular shoulder l6 for reenforcingthe end of the housing Ill. The other end of the housing 10 is providedwith a centrally located bore 18 communicating with the opening I2therethrough.

Partially disposed within the opening 12 are abrasive elements 20 and22-, the abrasive elements being in the form of elongated substantiallyrectangular cross-sectional members. In order that the abrasive elements20 and 22 may be resiliently urged outwardly, the opening I2 is providedin the center thereof with a longitudinally curved leaf spring 24 whosecentral portion engages the inner side of the abrasive element 20 andwhose end portions engage the inner side of the abrasive element 22. Theend portions of the leaf spring 24 are bent upwardly in order to preventfrictional engagement with the abrasive element 22 and are referred toby the reference numeral 25.

Due to the novel manner in which the abrasive elements 20 and 22 aremounted within the opening I 2 in the holder H}, the hone may beinserted within the bore of a shot gun barrel 28 and the abrasiveelements 20 and 2-2 will automatically align themselves with the taperof the bore 30 of the shot gun barrel 28. In order that the hone may berotated within the bore 30, an operating rod 32 having an enlargedthreaded :cited objects and drawings.

end 34 may be threadedly engaged within the threaded opening M. Theoperating rod 32 may be rotated either manually or connected to aconventional portable electric drill in order to rotate the hone withinthe bore 30. It will be understood that the hone is reciprocated withinthe bore 30 of the shot gun barrel 28 while it is being rotated by theoperating rod 32.

Since the abrasive elements 28 and 22 have limited contact with the leafspring 2t, they are permitted to closely engage the bore 3% and be at aslight angle to the longitudinal axis or" the hone and, therefore, areself-aligning. However, if too much pressure is applied on the operatingrod 32 at angle to the longitudinal axis of the bore 3%, there will be atendency of the housing H] to come out of alignment with the bore v 38.This may be partially eliminated by making the enlarged shoulder It ofsuch a diameter that it will engage the bore 30 upon tilting of thehousing 18 from alignment with the longitudinal axis of the bore 33.Since the abrasive elements 28 and :22 are oil stones, it may bedesirable to apply oil to the interior of the housing it into theopening 52. Oil may be passed into the opening I2 through the bore it inthe end of the housing I0 through the use of any conventional oilapplicator.

It will be understood that the abrasive elements 2% and 22 may come insets of various grits in order that the rate of honing may becontrolled. It will be further understood that the purpose of the honeis to accurately hone out flaws, pits or other blemishes inside of ashot gun barrel.

The operation of this device will be understood from the foregoingdescription of the details thereof, taken in connection with the abovere- Further description would appear to be unnecessary.

Minor modifications of the device, varying in minor details from theembodiment of the device illustrated and described here, may be resortedto without departure from the spirit and scope of this invention, asdefined in the appended claim.

Having described the invention what is claimed as new is:

A self-aligning hone for refinishing shot gun barrels, said honecomprising an elongated operating rod, an elongated holder carried bysaid operating rod, a longitudinally extending elongated rectangularopening of constant cross section extending transversely through saidholder, a pair of generally rectangular constant cross sectional bondedabrasive elements freely mounted within said opening, a singlelongitudinally curved leaf spring disposed entirely within said openingbetween said abrasive elements, said spring resiliently resistingmovement of said abrasive elements within opening towards each other,said abrasive elements and said spring being free to move as a unitwithin and out of said opening whereby said abrasive elements may remainin even contact with a gun barrel, said abrasive elements and saidspring being movable to a position at an angle to the longitudinal axisof said holder.

CLARK E. SEYMOUR.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,355,726 Zlatnik Oct. 12, 1920 1,523,649 Karstens Jan. 20,1925 1,872,198 Rixel Aug. 16, 1932 1,965,128 Miller July 3, 193 i2,147,387 Schwarz Feb. 14, 1939

